Quote Originally Posted by cliveh View Post
I know, but I'm talking about both integrated in the same camera.
David G is exactly right. For example, Hasselblad for medium format, Linhof and Sinar Bron for view cameras, make interchangeable digital and film backs. Shoot digitally and hope the image doesn't disappear after awhile, and then switch backs and shoot the scene on film to preserve it forever.